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Fix MBC7 (specifically Kirby Tilt 'n' Tumble) data saving (Steelskin) (#459)

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Commit reference: https://github.com/visualboyadvance-m/visualboyadvance-m/commit/803ab352

Previously, MBC7 EEPROM was saved at address 0xa000 in memory, rather
than inside the `gbRam` data buffer. This was inconsistent with other
mappers, resulting in issues like the EEPROM data being cleared on
`gbReset`.
This commit is contained in:
saulfabreg Wii VC Project 2023-08-28 20:26:07 -05:00 committed by GitHub
parent e64840914d
commit 51702bb545
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 23 additions and 14 deletions
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17
source/vba/gb/GB.cpp
View File

@ -3,6 +3,7 @@
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <algorithm>
#include "../System.h"
#include "../NLS.h"
@ -2652,6 +2653,9 @@ void gbReset()
if (gbRomType >= 0x1c && gbRomType<=0x1e)
gbDataMBC5.isRumbleCartridge = 1;
memset(&gbDataMBC7, 0, sizeof(gbDataMBC7));
gbDataMBC7.mapperROMBank = 1;
memset(&gbDataHuC1, 0, sizeof(gbDataHuC1));
gbDataHuC1.mapperROMBank = 1;
@ -2821,7 +2825,7 @@ void gbWriteSaveMBC7(const char * name)
return;
}
fwrite(&gbMemory[0xa000],
fwrite(gbRam,
1,
256,
file);
@ -3088,7 +3092,7 @@ bool gbReadSaveMBC7(const char * name)
return false;
}
size_t read = fread(&gbMemory[0xa000],
size_t read = fread(gbRam,
1,
256,
file);
@ -3544,6 +3548,7 @@ static bool gbWriteSaveState(gzFile gzFile)
utilGzWrite(gzFile, &gbDataMBC2, sizeof(gbDataMBC2));
utilGzWrite(gzFile, &gbDataMBC3, sizeof(gbDataMBC3));
utilGzWrite(gzFile, &gbDataMBC5, sizeof(gbDataMBC5));
utilGzWrite(gzFile, &gbDataMBC7, sizeof(gbDataMBC7));
utilGzWrite(gzFile, &gbDataHuC1, sizeof(gbDataHuC1));
utilGzWrite(gzFile, &gbDataHuC3, sizeof(gbDataHuC3));
utilGzWrite(gzFile, &gbDataTAMA5, sizeof(gbDataTAMA5));
@ -3712,6 +3717,7 @@ static bool gbReadSaveState(gzFile gzFile)
else
utilGzRead(gzFile, &gbDataMBC3, sizeof(gbDataMBC3));
utilGzRead(gzFile, &gbDataMBC5, sizeof(gbDataMBC5));
utilGzRead(gzFile, &gbDataMBC7, sizeof(gbDataMBC7));
utilGzRead(gzFile, &gbDataHuC1, sizeof(gbDataHuC1));
utilGzRead(gzFile, &gbDataHuC3, sizeof(gbDataHuC3));
if(version>=11)
@ -4314,7 +4320,8 @@ bool gbUpdateSizes()
}
if(gbRamSize) {
gbRam = (u8 *)malloc(gbRamSize);
// Always allocate 4 KiB to prevent access issues down the line.
gbRam = (u8 *)malloc(std::max(4096, gbRamSize));
memset(gbRam, gbRamFill, gbRamSize);
}
@ -5544,7 +5551,7 @@ int MemgbWriteSaveMBC5(char * membuffer) {
int MemgbWriteSaveMBC7(char * membuffer) {
if (gbRam) {
memcpy(membuffer, &gbMemory[0xa000], 256);
memcpy(membuffer, gbRam, 256);
return 256;
}
return 0;
@ -5656,7 +5663,7 @@ bool MemgbReadSaveMBC7(char * membuffer, int read) {
if (read != 256)
return false;
else
memcpy(&gbMemory[0xa000], membuffer, read);
memcpy(gbRam, membuffer, read);
return true;
}
return false;

19
source/vba/gb/gbMemory.cpp
View File

@ -719,8 +719,9 @@ void mapperMBC7ROM(u16 address, u8 value)
if(value < 8) {
tmpAddress = (value&3) << 13;
tmpAddress &= gbRamSizeMask;
gbMemoryMap[0x0a] = &gbMemory[0xa000];
gbMemoryMap[0x0b] = &gbMemory[0xb000];
gbMemoryMap[0x0a] = &gbRam[0];
// Only one RAM bank for MBC7 so wrap around.
gbMemoryMap[0x0b] = &gbRam[0];
gbDataMBC7.mapperRAMBank = value;
gbDataMBC7.mapperRAMAddress = tmpAddress;
@ -795,8 +796,8 @@ void mapperMBC7RAM(u16 address, u8 value)
if(!oldCs && gbDataMBC7.cs) {
if(gbDataMBC7.state==5) {
if(gbDataMBC7.writeEnable) {
gbMemory[0xa000+gbDataMBC7.address*2]=gbDataMBC7.buffer>>8;
gbMemory[0xa000+gbDataMBC7.address*2+1]=gbDataMBC7.buffer&0xff;
gbRam[gbDataMBC7.address*2]=gbDataMBC7.buffer>>8;
gbRam[gbDataMBC7.address*2+1]=gbDataMBC7.buffer&0xff;
systemSaveUpdateCounter = SYSTEM_SAVE_UPDATED;
}
gbDataMBC7.state=0;
@ -863,8 +864,8 @@ void mapperMBC7RAM(u16 address, u8 value)
} else if((gbDataMBC7.address>>6)==1) {
if (gbDataMBC7.writeEnable) {
for(int i=0;i<256;i++) {
gbMemory[0xa000+i*2] = gbDataMBC7.buffer >> 8;
gbMemory[0xa000+i*2+1] = gbDataMBC7.buffer & 0xff;
gbRam[i*2] = gbDataMBC7.buffer >> 8;
gbRam[i*2+1] = gbDataMBC7.buffer & 0xff;
systemSaveUpdateCounter = SYSTEM_SAVE_UPDATED;
}
}
@ -872,7 +873,7 @@ void mapperMBC7RAM(u16 address, u8 value)
} else if((gbDataMBC7.address>>6) == 2) {
if (gbDataMBC7.writeEnable) {
for(int i=0;i<256;i++)
WRITE16LE((u16 *)&gbMemory[0xa000+i*2], 0xffff);
WRITE16LE((u16 *)&gbRam[i*2], 0xffff);
systemSaveUpdateCounter = SYSTEM_SAVE_UPDATED;
}
gbDataMBC7.state=5;
@ -894,8 +895,8 @@ void mapperMBC7RAM(u16 address, u8 value)
if(gbDataMBC7.count==1) {
gbDataMBC7.state=4;
gbDataMBC7.count=0;
gbDataMBC7.buffer = (gbMemory[0xa000+gbDataMBC7.address*2]<<8)|
(gbMemory[0xa000+gbDataMBC7.address*2+1]);
gbDataMBC7.buffer = (gbRam[gbDataMBC7.address*2]<<8)|
(gbRam[gbDataMBC7.address*2+1]);
}
break;
case 3:

1
source/vba/gb/gbMemory.h
View File

@ -138,6 +138,7 @@ extern mapperMBC1 gbDataMBC1;
extern mapperMBC2 gbDataMBC2;
extern mapperMBC3 gbDataMBC3;
extern mapperMBC5 gbDataMBC5;
extern mapperMBC7 gbDataMBC7;
extern mapperHuC1 gbDataHuC1;
extern mapperHuC3 gbDataHuC3;
extern mapperTAMA5 gbDataTAMA5;